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UC-NRLF 


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GIFT  OF 


No.  1927 


DESCRIPTION 


OF  THE 


Coifs  Double-Action  Revolver 

CALIBER  45 

MODEL   OF  1909 

WITH  RULES  FOR  MANAGEMENT,  MEMORANDA 
OF  TRAJECTORY,  AND  DESCRIP- 
TION OF  AMMUNITION 


(FIVE  PLATES) 


SEPTEMBER  10,  1909    ^"^V^^^^f  i^ 
REVISED  JUNE  30,  1913  uNiVERSI'^V 


.^^1.,; 


WASHINGTON 

GOVERNMENT  PRINTING  OFFICE 

1917 


No.  1927 


DESCRIPTION 

OF  THE 

Colt's  Double- Action  Revolver 

CALIBER  .45 

I  MODEL   OF  1909 

WITH  RULES  FOR  MANAGEMENT,  MEMORANDA 
OF  TRAJECTORY,  AND  DESCRIP- 
TION OF  AMMUNITION 


(FIVE  PLATES) 


SEPTEMBER  10/1909 
REVISED  JUNE  30,  1913 


WASHINGTON 

GOVERNMENT  PRINTING  OFFICE 

1917 


^^P 


A^ 


War  Department^ 
Office  of  the  Chief  op  Ordnance, 

Washington,  June  SO,  19tS. 
This  manual  is  published  for  the  information  and  government  of  the  Regular  Army 
and  Organized  Militia  of  the  United  States. 
By  order  of  the  Secretary  of  War: 

R.  BiRNIE, 

Colonelf  Ordnance  Department^ 

Acting  Chief  of  Ordncmee, 

104719—17  (3) 


303178 


Digitized  by  the  Internet  Archive 

in  2007  with  funding  from 

IVIicrosoft  Corporation 


http://www.archive.org/details/coltrevolverOOunitrich 


DESCRIPTION  OF  COLT'S  DOUBLE-ACTION  REVOLVER, 

CALIBER  .45. 


(S  FJL.A.  .  PIS.) 


The  Colt's  double-action  revolvers,  caliber  .45,  in  service  are  marked 
*'U.  S.  Army  model,  1909." 


and  firing-pim 


COMPONENT  PARTS. 

1.  Butt  swivel. 

24. 

Hammer-strut  pin. 

2.  Butt-swivel  pin. 

25. 

Hammer-strut  spring. 

3.  Crane. 

26. 

Hammer,   firing  pin, 

4.  Crane  bushing. 

rivet. 

5.  Crane  lock. 

27. 

Hammer  pin. 

6.  Crane-lock  screw. 

28. 

Hammer  stirrup. 

7.  Cylinder  bolt. 

29. 

Hammer-stirrup  pin. 

8.  Cylinder-bolt  spring. 

30. 

Safety. 

9.  Cylinder-bolt  screw. 

31. 

Safety  lever. 

10.  Hand. 

32. 

Trigger. 

11.  Rebound  lever. 

33. 

Trigger  pin. 

12.  Rebound-lever  pin. 

34. 

Mainspring. 

13.  Ejector-rod  head. 

35. 

Stock,  right. 

14.  Ejector  rod. 

36. 

Escutcheon,  threaded 

15.  Ejector  spring. 

37. 

Escutcheon,  plan. 

16.  Ejector  and  ratchet. 

38. 

Stock,  left. 

17.  Side  plate. 

39. 

Stock  pin. 

18.  Side-plate  screws  (2). 

40. 

Stock  screw. 

19.  Latch. 

41. 

Barrel. 

20.  Latch  pin. 

42. 

Frame. 

21.  Latch  spring. 

43. 

Front  sight. 

22.  Cylinder. 

44. 

Recoil  plate. 

23.  Hammer  strut. 

Screw-driver. 

OPERATION  OF  THE  PARTS. 

Plate  I  is  a  side  view  of  the  revolver. 

Plate  II  shows  the  revolver  with  the  side  plate  and  stock  removed, 
and  with  cylinder  and  other  parts  cross  sectioned  to  show  construction. 

Plate  III  shows  the  component  parts,  except  ths  barrel,  sight,  and 
frame. 

In  the  plates,  parts  are  given  the  same  numbers  as  in  the  list  of 
component  parts  and  in  the  description  that  follows. 

The  barrel  (41)  is  firmly  screwed  to  the  frame  (42).  Tha  bore  is 
.445  inch.     The  front  sight  (43)  is  brazed  on  the  barrel.     The  rear 

(5) 


sight  is  mereiy  a  loagitudhial  groove  in  the  upper  surface  of  the 
frame. 

The  lock  mechanism  is  contained  in  the  frame  and  consists  of  the 
hammer  (26)  with  its  stirrup  (28),  stirrup  pin  (29),  strut  (23),  strut 
pin  (24),  and  strut  spring  (25);  the  trigger  (32)  with  its  pin  (33);  the 
rebound  lever  (11) ;  the  hand  (10) ;  the  cylinder  bolt  (7)  with  its  spring 
(8);  the  mainspring  (34),  which  also  serves  as  a  rebound-lever  spring, 
hand  spring,  and  trigger  spring;  the  safety  (30)  and  safety  lever  (31). 

The  hammer  (26)  and  trigger  (32)  are  pivoted  on  their  respective 
pins,  which  are  fastened  in  the  right  side  of  the  frame  (42).  The 
rebound  lever  (11)  is  pivoted  on  its  pin  (12)  within  grip  of  the  frame. 
The  lower  end  of  the  mainspring  (34)  fits  into  a  slot  in  the  frame, 
and  its  upper  end  engages  the  hammer  stirrup  (28). 

The  lower  arm  of  tjie  mainspring  (34)  bears  on  the  upper  surface 
of  the  rebound  lever  (11),  so  that  the  latter,  when  the  trigger  (32) 
is  released  after  firing  a  shot,  carries  the  hammer  back  to  its  safety 
position  and  forces  the  trigger  forward,  bringing  the  hand  back  to 
its  forward  and  lowest  position.  The  safety  lever  (31)  being  pinned 
to  the  trigger  (32)  by  this  same  motion  moves  the  safety  (30)  upward 
in  front  of  the  hammer  (26). 

The  revolver  may  be  used  either  single  action  or  double  action. 
In  firing  double  action,  pressure  upon  the  trigger  (32)  causes  its 
upper  edge  to  engage  the  hammer  strut  (23)  and  thereby  raises  the 
hammer  (26)  until  nearly  in  full-cock  position,  when  the  strut  wiU 
escape  from  the  trigger,  and  the  hammer,  under  action  of  the  main- 
spring (34),  wiU  faU  and  strike  the  cartridge.  In  firing  single  action, 
the  hammer  (26)  is  first  pulled  back  with  the  thumb  until  the  upper 
edge  of  the  trigger  (32)  engages  in  the  full-cock  notch  in  the  front 
end  of  the  lower  part  of  the  hammer.  Pressure  on  the  trigger  will 
release  the  hammer,  which,  under  the  action  of  the  mainspring  (34), 
will  fall  and  strike  the  cartridge. 

The  cylinder  bolt'(7)  is  pivoted  on  its  screw  (9),  which  is  supported 
in  right  side  of  frame.  The  cylinder-bolt  spring  (8)  pressing  upward 
causes  the  nose  of  the  bolt  (7)  to  project  through  a  slot  in  the  frame 
ready  to  enter  one  of  the  rectangular  cuts  in  the  surface  of  the  cyl- 
inder (22).  During  the  first  part  of  the  movement  of  the  trigger  (32) 
in  cocking  the  revolver,  the  nose  of  the  bolt  is  withdrawn  from  the 
cylinder  by  rear  end  of  bolt  coming  in  contact  with  lug  on  rebound 
lever,  permitting  the  rotation  thereof.  The  object  of  the  cylinder 
bolt  is  to  hold  the  firing  chamber  in  line  with  the  barrel,  and  also  to 
prevent  the  cylinder  making  more  than  one-sixth  of  a  revolution  at 
the  time  of  cocking. 

The  hand  (10)  is  attached  by  its  pivot  to  the  trigger,  and  as  the 
latter  swings  on  its  pin  when  the  hammer  is  being  cocked,  the  hand 
is  raised,  revolves  the  cylinder,  and  serves  with  the  bolt  (7)  to  lock 


the  cylinder  in  proper  position  at  time  of  firing,  i.  e.,  the  axis  of  the 
chamber  containing  cartridge  to  be  fired  coinciding  with  the  axis  of 
the  bore  of  the  barrel.  The  pressure  of  the  rebound  lever  (11)  on 
the  lug  on  the  hand  insures  the  engagement  of  the  hand  with  the 
ratchet. 

The  cylinder  (22)  has  six  chambers.  It  revolves  around  and  is 
supported  on  a  central  arbor  of  the  crane  (3).  The  crane  fits  into 
a  recess  in  the  frame  below  the  barrel  and  turns  on  its  pivot  arm, 
which  rotates  in  a  hole  in  that  part  of  the  frame  below  the  opening 
for  the  cylinder,  and  is  secured  by  the  crane  lock  (5)  and  crane-lock 
screw  (6).  The  ejector  rod  (14)  passes  through  the  center  of  the 
arbor  of  the  crane  supporting  the  cylinder,  and,  projecting  under 
the  barrel,  is  terminated  by  the  ejector-rod  head  (13).  The  ejector 
(16),  of  which  the  ratchet  forms  a  part,  is  screwed  on  the  rear  end 
of  the  ejector  rod  with  a  right-handed  thread  and  then  firmly  secured 
by  upsetting  the  end  of  the  rod.  The  ejector  spring  (15)  is  coiled 
around  the  ejector  rod  within  the  cylinder  arbor  of  the  crane,  the 
front  end  bearing  on  a  shoulder  of  the  rod  and  the  rear  end  on  the 
crane  bushing  (4),  which  is  screwed  with  a  right-handed  thread  into 
and  closes  the  cylinder  arbor. 

The  latch  slides  longitudinally  on  the  left  side  of  the  side  plate, 
and  is  connected  to  the  latch  pin  (20)  by  latch-pin  stud,  causing  it 
to  follow  the  movement  of  the  latch  thumb  piece.  The  latch  pin 
slides  in  a  hole  in  the  frame,  and  when  the  cylinder  is  swung  into  the 
frame,  the  latch  pin,  under  action  of  the  latch  spring  (21),  is  forced 
into  a  recess  in  the  ejector  and  locks  the  cylinder  in  position  for 
firing.  The  latch  spring  (21)  is  contained  in  a  hole  in  the  side  plate 
in  the  rear  of  the  latch  slot.  The  recoil  plate  (44)  is  driven  into  its 
recess  in  the  frame  and  secured  therein  by  slightly  upsetting  the  rim. 
To  Eject  the  Shells  and  Load. 

To  eject  the  shells  and  load,  push  the  latch  to  the  rear  and  swing 
the  cylinder  to  the  left  out  of  the  frame;  pressure  against  the  front 
end  of  the  ejector-rod  head  will  empty  the  chambers,  and  the  cylinder 
is  then  ready  to  be  loaded;  swing  the  cylinder  into  the  frame,  taking 
care  that  it  is  revolved  so  that  the  cylinder  bolt  will  enter  one  of  the 
rectangular  cuts  in  its  surface. 

To  Dismount  and  Assemble  Revolver. 

To  dismount  the  revolver,  remove  the  parts  in  the  following  order : 
Crane-lock  screw  (6)  and  crane  lock  (5);  crane  (3)  with  cylinder  (22); 
stock  screw  (40);  stocks  (35  and  38);  side-plate  screws  (18);  side 
plate  (17);  mainspring  (34);  rebound-lever  pin  (12);  rebound  lever 
(11);  hand  (10)  and  trigger  (32);  hammer  (26);  cylinder-bolt  screw 
(9);  cylmder  bolt  (7);  cylinder-bolt  spring  (8);  latch  pin  (20);  safety 
lever  (31);  and  safety  (30). 


8 

The  crane  and  cylinder  should  not  be  further  dismounted  or  the 
recoil  plate  removed  except  at  ordnance  depots.  The  crane  and 
cylinder  are  dismounted  as  follows:  (a)  Unscrew  ejector  (16)  from 
ejector  rod  (14),  right-handed  thread;  (b)  remove  cylinder  (22)  from 
crane  arbor;  (c)  unscrew  ejector-rod  head  (13)  from  ejector  rod  (14); 
(d)  unscrew  crane  bushing  (4),  right-handed  thread;  (e)  remove 
ejector  rod  (14)  and  spring  (15). 

To  assemble,  reverse  the  above  order. 

Caution. 

In  order  that  the  trigger  will  return  to  its  normal  or  firing  position 
after  each  pull  on  the  same,  the  pressure  or  grip  on  the  trigger  should 
be  entirely  released  after  each  discharge. 

Failure  to  observe  this  caution  may  result  in  temporary  blocking 
of  the  trigger  due  to  the  fact  that  the  trigger  must,  alter  discharge, 
move  to  its  normal"  or  firing  position  in  order  that  the  cylinder  bolt 
may  be  released  irom  the  cylinder  when  pressure  is  applied  to  the 
trigger,  leaving  the  cylinder  free  to  revolve  under  action  of  the  hand. 


PARTS  ISSUED  FOR  REPAIRS. 
To  Ordnance  Officers  of  Posts  and  Regiments. 


For  making  repairs  to  these 
field  and  garrison  the  following 
officers  ol  posts  and  regiments, 
the  maximum  for  100  revolvers, 
necessary  for  ordinary  repairs 
replacement  of  parts  other  than 
depots  by  expert  workmen  with 


revolvers  in  the  hands  ol  troops  in 
spare  parts  ar3  issued  to  ordnance 

The  numbsr  opposite  each  part  is 
which  has  by  experience  been  found 

per  year.  Repairs  involving  the 
those  can  only  be  properly  made  at 
the  proper  tools. 


Name  of  component  parts. 


Crane  lock 

Crane-lock  screw 

Cylinder  bolt 

Cylinder-bolt  screw 

Cylinder-bolt  spring 

Ejector-rod  head 

Hammer  with  strut,  strut  pin,  and  strut  spring  assembled. 

Hammer  stirrup 

Hamraer-stirrup  pin 

Hammer-strut  spring 

Latch  pin 

Latch  sirring 

Ma  inspring : 

Rebound  lever 

Side-plate  screws 

Safety. 


Safety  lever 

Stock,  right  1 

Stock,  left  I 

Stock  screw 

Trigger  (includes  safety-lever  pin) . 

Appendage :  Screw  driver 


Number. 


Includes  escutcheons,  plain  and  threaded. 


To  Ordnance  Depots. 

In  addition  to  the  above,  the  following  parts  and  special  gauges 
and  tools  are  issued  to  ordnance  depots: 

Crane  bushing.  Punch,  set,  and  block  for  replacing  recoil 

Cylinder,    ejector,    and    ejector   rod    as-  !      plates, 
sembled.  j  Range  rod  for  testing  alignment  of  the 


Ejector  rod. 

Ejector  spring. 

Gauge  for  space  between  cylinder  and 

barrel. 
Hammer  pin. 
Hand. 


barrel  and  chambers  of  cylinder. 
Rebound -lever  pin. 
Recoil  plate. 

Set  to  upset  rod  in  ratchet. 
Stock  pin. 
Trigger  pin. 

In  removing  or  replacing  a  hand  in  a  revolver,  lift  rebound  lever 
by  inserting  screw  driver  between  it  and  frame,  so  as  to  free  it  from 
lug  on  hand,  and  it  is  important  that  it  be  so  adjusted  that  the 
upward  movement  of  the  hand  will  not  begin  to  revolve  the  cylinder 
before  the  trigger  withdraws  "the  cylinder  bolt.  To  insure  this  it 
may  be  necessary  to  file  the  hand  slightly  at  the  end  which  first 
engages  the  ratchet,  and,  as  this  may  bring  the  two  points  of  the 
hand  which  engage  the  teeth  of  the  ratchet  too  near  together,  the 
lower  projection  may  also  have  to  be  slightly  filed.  The  length  and 
thickness  of  this  lower  projection  must  be  adjusted  so  as  to  bring  the 
cylinder  in  proper  position  for  firing.  This  can  be  done  only  hj 
expert  workmen  at  the  factory. 

PARTS  NOT  ISSUED. 

The  following  parts  are  not  issued : 


Barrel. 

Frame. 

Crane. 

Latch. 

Cylinder  without  ejector  and  ejector  rod. 

Side  plate 

Ejector  without  cylinder. 

Sight. 

In  the  case  of  breakage  or  injury,  disabling  the  revolver,  to  parts 

other  than  those  that  may  be  issued  for  repairs  as  designated,  either 

separately  or  assembled,  the  revolver  must  be  returned  to  an  arsenal 

for  repairs. 

IMPORTANT  POINTS. 

(1)  TJie  revolver  should  he  Icept  clean,  free  from  rust,  and  properlf 
oiled.  The  oil  should  not  he  used  in  excess.  Waste  oil  left  in  the  mech- 
anism will  cause  the  parts  to  gum  and  worTc  stiffly. 

(2)  The  lock  mechanism  must  not  he  tampered  with.  The  side  plate 
should  not  he  removed  except  under  the  supervision  of  a  noncommis- 
sioned officer. 

(3)  Never  attempt  to  remove  the  side  plate  hy  prying  it  out  cf  place. 
It  should  he  jarred  out  of  place  hy  smart  hlows  strucJc  with  a  piece  of  wood 
on  the  left  side  of  the  frame  where  it  is  covered  hy  the  stoclc. 


10 

(4)  The  side  plate  must  he  replaced  from  the  rear  so  as  to  put  the  latch 
pin  stud  in  the  proper  position,  care  being  taken  that  the  latch  is  drawn 
haclc,  the  latch  pin  forward  and  its  stud  upright,  so  that  it  may  enter  the 
hole  in  latch  without  forcing.  See  that  the  latch  spring  is  in  its  proper 
position  in  rear  of  latch. 

(5)  The  crane  and  cylinder  must  not  he  dismounted  unless  suitable 
tools  are  available,  and  not  then  unless  absolutely  necessary. 

(6)  Never  attempt  to  open  the  cylinder  when  the  hammer  is  coclced. 

(7)  Never  attempt  to  cocJc  the  hammer  until  the  cylinder  is  fully  closed 
and  loclced  in  the  frame. 

DIMENSIONS. 

Weight - rpounds..     2 

\ounces  . .     7 

Total  length inches. .  10.  8 

Barrel: 

Length do 5.  5 

Diameters!  bore do 445 

Rifling,  number  of  grooves 6 

Grooves: 

Width inches..      .165 

Depth : do 0035 

Twist,  one  turn  in do 16 

Lands,  width , do 065 

Cylinder: 

'     Length .do. ...     1  625 

Diameter do 1.  695 

Chambers: 

Number 6 

{maximum inches. .      .  4873 
minimum do 4803 

Front  sight  above  axis  of  bore do 697 

EXTERIOR  BALLISTICS. 
1.  Rapidity  op  Fire. 

This  pistol  can  be  fired  18  times  in  thirty-eight  and  two-fifths  sec- 
onds, loading  each  chamber  separately,  and  beginning  6,nd  ending  with 
cylinder  closed  and  chamber  empty. 

Firing  at  25  yards'  distance  at  the  figm-e  of  a  man,  and  using  the 
pistol  as  a  self-cocker,  loading  each  chamber  separately,  18  shots 
have  been  fired  in  one  minute  and  ten  and  three-fifths  seconds, 
making  15  hits,  starting  and  finishing  with  the  cylinder  closed  and 
the  chamber  empty. 

Firing  at -the  same  figure  at  25  yards,  loading  each  chamber  sepa- 
rately and  using  the  pistol  in  ''single  action,"  18  shots  have  been 
Gred  in  one  minute  and  fifteen  seconds,  making  16  hits,  starting  and 
finishing  with  cylinder  closed  and  chamber  empty. 


11 


2.   ACCUKACY  WITH   FiXED   ReST. 


Range. 

Mean 
radius. 

Mean  ver- 
tical devia- 
tion. 

Yards. 
25 
50 
75 

Inches. 
1.058 
2.042 
2.61 

Inches. 
0.692 
1.724 
1.681 

The  above  figures  represent  the  mean  variations  for  a  great  number 
of  targets.     Targets  with  50  per  cent  less  variations  have  been  made. 


3.  Drift. 


The  drift  or  deviation  due  to  the  rifling  is,  in  this  arm,  to  the  left, 
but  is  more  than  neutralized  by  the  pull  of  the  trigger  when  the 
pistol  is  fired  from  the  right  hand.  T^he  drift  is  slight  at  short  ranges 
and  that  for  long  ranges  is  immaterial,  inasmuch  as.  the  pistol  is  a 
short-range  weapon. 


4.  Velocity  with  Striking  Energy. 


Bange. 

Velocity. 

Energy. 

Feet  per 

Foot- 

Yards. 

second. 

pounds. 

0 

738.0 

297.3 

25 

687.4 

257.85 

50 

651.3 

231.48 

75 

617.8 

208.28 

100 

585.7 

187.2 

125 

555.4 

168.  a*j 

150 

526.5 

151.27 

175 

499.0 

135.88 

200 

473.1 

121.25 

5.  Penetration  in  White  Pine. 


Range  in  yards ....      25 

60 

75 

100 

150 

200 

Depth  in  inches 3.45 

1 

3.38 

3.22 

3.15 

3.00 

2.18 

A  penetration  of  1  inch  in  white  pine  corresponds  to  a  dangerous 
wound. 

The  penetration  in  moist  loam  at  25  yards  is  19.2  inches. 

The  penetration  in  dry  sand  at  25  yards  is  8.28  inches. 

Plate  V  shows  the  trajectory,  with  ammunition  model  of  1909,  up  to 
200  yards.  The  maximum  ordinate  for  this  range  is  4.16  feet.  The 
trajectory  is  very  flat  up  to  75  yards,  at  which  range  the  revolver  is 
accurate.  A  close  approximation  to  the  maximum  ordinate  for  any 
range  may  be  obtained  by  multiplying  the  square  of  the  range  in 
yards  by  .000144,  the  result  being  the  approximate  ordinate  in  feet. 


12 

AMMUNITION  FOR  COLT'S  DOUBLE-ACTION  REVOLVER,  CALIBER  .45, 

MODEL  OF  1909. 

Ball  Cartridge. 

(Plate-IV.) 

The  components  of  the  ball  cartridge  consists  of  cartridge  case, 
primer,  powder,  and  bullet. 

Cartridge  Case. 

The  cartridge  case  is  cylindrical,  and  is  made  of  brass.  It  is  pro- 
vided with  a  cannelure  to  prevent  rthe  bullet  being  forced  down  on 
the  powder.  ^ 

Prim  J?  R. 

The  primer  consists  of  a  cup  whi'ch  contains  the  primer  composi- 
tion, a  paper  disk,  and  an  anvil  which  resists  the  blow  of  the  firing 
pin.  The  anvil  is  provided  with  two  vents,  by  which  the  flame  is 
communicated  to  the  charge.  Ignition  is  produced  by  crushing  the 
composition  between  the  cup  and  anvil  by  a  blow  of  the  firing  pin. 

Powder. 

The  powder  used  is  the  R.  S.  Q.,  a  smokeless  powder.  The  charge 
varies  with  the  kind  and  lot,  but  it  is  generally  about  8.4  grains. 

Bullet. 

The  body  of  the  buUet  is  a  cylinder  having  two  rectangular  canne- 
lures containing  the  lubricant,  and  the  point  is  a  truncated  ogive. 
There  is  a  recess  in  the  base,  by  which  the  bullet  is  brought  to  proper 
weight  without  change  pi  exterior  form. 

Inches. 

Length  of  bullet .0.  735 

Diameter  of  cylindrical  part  of  bullet 4575 

Total  length  of  cartridge 1.  575 

The  bullet  is  lubricated  with  Japan  wax,  and  is  sealed  in  the  case 
below  the  cannelures  so  as  to  entirely  cover  the  lubricant  and  protect 
it.  To  render  the  cartridge  waterproof,  the  case  is  tightly  crimped 
around  the  bullet,  and  the  primer  is  shellacked. 

Packing. 

The  cartridges  are  packed  in  pasteboard  boxes  containing  20 
cartridges  each.  One  hundred  pasteboard  boxes;  or  2,000  cartridges, 
are  packed  in  one  zinc  case,  hermetically  sealed,  with  handle  for 
tearing  open.  The  whole  is  inclosed  in  a  wooden  box,  the  cover  of 
which  is  fastened  with  screw  hooks  and  thumb  nuts,  and  sealed. 

Pounds. 

Weight  of  100  cartridges 5 

Weight  of  2,000  cartridges,  packed 1 20 


13 

Blank  Cartridge. 

This  cartridge  has  the  same  case  and  primer  as  the  ball  cartridge. 
There  is  no  bullet.  A  charge  of  9  grains  E.  C.  powder  is  pressed  in 
the  case  and  held  there  by  a  cup  of  shellacked  paper,  then  a  second 
cup  is  inserted  about  0.16  of  an  inch  from  the  mouth,  and  this  cup 
is  shellacked  after  the  end  of  the  case  is  crimped  over.  Between  the 
first  and  second  cups  is  an  air  space  which  is  about  0.4  of  an  inch 
long. 

These  cartridges  are  packed  in  a  manner  similar  to  the  ball  car- 
tridges. The  packing-box  cover  has  not  the  quick-opening  screw- 
hook  and  thumb-nut  fastening.     A  box  of  2,000  cartridges  weighs 

48  pounds. 

Blank  Cartridge  (Present  Design). 

The  blank  cartridge  as  manufactured  since  March,  1910,  differs 
from  the  original  blank  with  two  paper  cups  in  that  only  one  cup 
is  used,  and  the  case  is  bottle-necked  and  closed  the  same  as  thQ 
caliber  .30,  model  of  1909,  blank.  A  charge  of  3.5  grains  of  E.  C. 
powder  is  used.     A  box  of  2,000  of  these  cartridges  weighs  38  pounds. 

Plate  IV  shows  the  blank  cartridges  of  both  former  and  present 
manufacture. 

War  Department, 

Office  op  the  Chief  op  Ordnance, 
Washington,  June  30,  1913. 

September  10, 1909. 
Revised  June  30, 1913. 
Form  No.  1927. 
Ed.  June  13-17—10,000. 
13092/270O-Enc.  1. 

O  ' 


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1  Makers 

7  Syracuse,  N.  Y. 
i  PirjAII.2l   .1908 

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.YC  63163 


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